RRGbank

To change a label, click on a node to select a different label from a list. The syntactic category and the function tag (before and after the dash "-") must be selected separately by clicking on the corresponding part of the label.
To add a function tag to a node that does not have one yet, drag it from the list of function tags onto the node.
Re-attach a node by dragging and dropping it on a new parent. This can be used to created discontinuous constituents.
Similarly, nodes can be removed and new ones added by dragging to/from below the tree.
Finally, the bracketing can be edited manually in the text box below the tree; press "validate" to update the tree. Whitespace is ignored. Each token must have a dedicated POS tag.

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(SENTENCE
  (CLAUSE
    (CORE
      (NP
        (OP-DEF 0=The)
        (CORE_N
          (NUC_N (N 1=plant))
          (, 2=,)
          (CLAUSE-PERI
            (PrCS (NP-WH (WDT 3=which)))
            (CORE
              (NUC (AUX-TNS 4=is) (V 5=owned))
              (PP
                (CORE_P
                  (NUC_P (P 6=by))
                  (NP
                    (CORE_N
                      (NUC_N
                        (N-PROP 7=Hollingsworth)
                        (CLM 8=&)
                        (N-PROP 9=Vose)
                        (N-PROP 10=Co.))))))))
          (, 11=,)))
      (AUX-TNS 12=was)
      (PP-PERI
        (CORE_P
          (NUC_P (P 13=under))
          (NP
            (CORE_N
              (NUC_N (N 14=contract))
              (PP
                (CORE_P (NUC_P (P 15=with)) (NP (CORE_N (NUC_N (N 16=Lorillard))))))
              (CORE
                (CLM 17=to)
                (NUC (V 18=make))
                (NP (OP-DEF 19=the) (CORE_N (NUC_N (N 20=cigarette) (N 21=filters)))))))))
      (. 22=.))))

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(SENTENCE
  (CLAUSE
    (CORE
      (NP
        (CORE_N
          (NUC_N (N 1=plant))
          (CLAUSE-PERI
            (PrCS (NP-WH (PRO-WH 3=which)))
            (CORE
              (PP-PERI
                (CORE_P
                  (NUC_P (P 6=by))
                  (NP
                    (CORE_N
                      (NUC_N
                        (N-PROP 10=Co.)
                        (NUC_N (N-PROP 7=Hollingsworth) (N-PROP 9=Vose) (CLM 8=&)))))))
              (NUC (V 5=owned) (AUX-TNS 4=is)))))
        (OP-DEF 0=The)
        (, 11=,)
        (, 2=,))
      (NUC
        (AUX-TNS 12=was)
        (PP
          (CORE_P
            (NUC_P (P 13=under))
            (NP
              (CORE_N
                (NUC_N (N 14=contract))
                (CORE-PERI
                  (NP (CORE_N (NUC_N (N 21=filters) (N 20=cigarette))) (OP-DEF 19=the))
                  (CLM 17=to)
                  (NUC (V 18=make)))
                (PP-PERI
                  (CORE_P
                    (NUC_P (P 15=with))
                    (NP (CORE_N (NUC_N (N 16=Lorillard)))))))))))
      (. 22=.))))

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Supertags

	token	arc	supertag
1	The	2	(NP* (OP-DEF <>))
2	plant	13	(NP (CORE_N (NUC_N (N <>))))
3	,	6	(SENTENCE-PERI* (, <>))
4	which	6	(NP-REL (PRO-REL <>))
5	is	6	(NUC* (AUX-TNS <>))
6	owned	2	(NP* (SENTENCE-PERI (CLAUSE (PrCS (NP-REL )) (CORE (NUC (V <>)) (PP (P ) (NP ))))))
7	by	6	(P <>)
8	Hollingsworth	11	(NUC_N* (N-PROP <>))
9	&	11	(NUC_N* (CLM <>))
10	Vose	11	(NUC_N* (N-PROP <>))
11	Co.	6	(NP (CORE_N (NUC_N (N-PROP <>))))
12	,	6	(SENTENCE-PERI* (, <>))
13	was	0	(SENTENCE (CLAUSE (CORE (NP ) (NUC (AUX-TNS <>) (PP (P ) (NP ))))))
14	under	13	(P <>)
15	contract	13	(NP (CORE_N (NUC_N (N <>)) (PP ) (CORE )))
16	with	15	(PP (P <>) (NP ))
17	Lorillard	16	(NP (CORE_N (NUC_N (N-PROP <>))))
18	to	19	(CORE* (CLM <>))
19	make	15	(CORE (NUC (V <>)) (NP ))
20	the	22	(NP* (OP-DEF <>))
21	cigarette	22	(NUC_N* (N <>))
22	filters	19	(NP (CORE_N (NUC_N (N <>))))
23	.	0	(SENTENCE (. <>))